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The patent EP3850072 was granted to Claro Products on Jan 3, 2024. The application was filed on Sep 12, 2019 under application number EP19766024A. The patent is currently recorded with a legal status of "Granted And Under Opposition".
A silver protective agent for detergents, particularly dishwashing detergents, that prevents discoloration of silver-containing products during washing. The agent comprises bismuth citrate, a degradable carboxylate or phosphonate, and a salt of methylglycinediacetic acid, which are combined to provide effective protection against silver oxidation and discoloration while being biodegradable and environmentally friendly.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative | Opposition Status |
|---|---|---|---|
| RECKITT BENCKISER | Oct 3, 2024 | HODGETTS | ADMISSIBLE |
| DALLI WERKE | Sep 11, 2024 | F & E PATENT | ADMISSIBLE |
| HENKEL | Sep 10, 2024 | - | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | EP0872543 |
| DESCRIPTION | EP0906407 |
| DESCRIPTION | GB2297096 |
| DESCRIPTION | GB2311535 |
| DESCRIPTION | US4654159 |
| DESCRIPTION | US5062962 |
| DESCRIPTION | US5147555 |
| DESCRIPTION | WO2009040544 |
| DESCRIPTION | WO9703177 |
| INTERNATIONAL-SEARCH-REPORT | GB1586067 |
| INTERNATIONAL-SEARCH-REPORT | GB2297096 |
| INTERNATIONAL-SEARCH-REPORT | GB2311535 |
| OPPOSITION | EP1721962 |
| OPPOSITION | WO2008017620 |
| OPPOSITION | WO2008087200 |
| OPPOSITION | WO2009092699 |
| OPPOSITION | WO2013057041 |
| OPPOSITION | WO2013092276 |
| OPPOSITION | WO2014194032 |
| OPPOSITION | WO2014194034 |
| OPPOSITION | WO2014194054 |
| OPPOSITION | WO2018118950 |
| OPPOSITION | WO9736975 |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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Decision to grant a European patent
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English translation of the claims
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Filing of the translations of the claims
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French translation of claims
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Letter accompanying subsequently filed items
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Intention to grant (signatures)
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Text intended for grant (clean copy)
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Examination started
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(Electronic) Receipt
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Amended claims with annotations
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Amended description with annotations
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Letter accompanying subsequently filed items
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Priority search results copy provided by EPO
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(Electronic) Receipt
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Request for entry into the European phase
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Information on entry into European phase
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Copy of the international search report
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Copy of the international search report
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Published international application - A1
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Dec 11, 2019
ISR: cited documents
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